Police closed two train lines in Barcelona's main station on Wednesday after a security scanner detected an object inside a suitcase that could be an explosive.
Spain's world-famous opera singer Montserrat Caballe has died in Barcelona on Saturday, a source at the hospital where she was being treated said.
Thousands of people demonstrating both for and against Catalan independence shut down parts of central Barcelona on Saturday, two days before the anniversary of a vote on secession last year that polarised the wealthy Spanish region.
Taxi drivers have choked main roads and snarled airports, bus and train stations since Saturday.
The World Cup champion and four-times Champions League winner said he feels fit enough to continue playing a little longer.
A day after hundreds of thousands of people marched in Barcelona to demand the release of separatist officials, Mariano Rajoy also urged businesses not to flee the wealthy northern region.
Hundreds of thousands of supporters of a unified Spain filled Barcelona's streets on Sunday in one of the biggest shows of force yet by the so-called silent majority that has watched as regional political leaders push for Catalan independence.
The wealthy region's intention to break away has plunged Spain into its worst political crisis since an attempted military coup in 1981, with Madrid threatening to sack the Catalan government if it goes ahead.